#include <stdio.h>
#define MAX 20
int main(void)
{
    int a[MAX], n, i, j, used = 0, found;
    if (scanf("%d", &n) != 1 || n < 1 || n > MAX) {
        puts("Enter a count from 1 to 20.");
        return 1;
    }
    for (i = 0; i < n; i++) {
        if (scanf("%d", &a[i]) != 1 || a[i] < -100 || a[i] > 100) {
            puts("Enter each value from -100 to 100.");
            return 1;
        }
    }
    for (i = 0; i < n; i++) {
        found = 0;
        for (j = 0; j < used; j++) {
            if (a[j] == a[i]) { found = 1; break; }
        }
        if (!found) a[used++] = a[i];
    }
    printf("Unique values:");
    for (i = 0; i < used; i++) printf(" %d", a[i]);
    putchar('\n');
    return 0;
}